Q370qENH和Q355C在干湿交替环境中界面腐蚀机理研究

蔡振宇; 孙立娟; 孙虎元; 张占森; 渠述强; 杭杰周; 李辉; 丁江云; 杜旭喆

doi:10.7643/issn.1672-9242.2026.10.014

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (10) : 123-131. DOI: 10.7643/issn.1672-9242.2026.10.014

船舶及海洋工程装备

Q370qENH和Q355C在干湿交替环境中界面腐蚀机理研究

蔡振宇^1,2, 孙立娟¹, 孙虎元^1,2,*, 张占森³, 渠述强⁴, 杭杰周⁴, 李辉^5,6, 丁江云⁶, 杜旭喆⁶

作者信息 +

Interface Corrosion Mechanism of Q370qENH and Q355C Steels under Dry-Wet Alternating Conditions

CAI Zhenyu^1,2, SUN Lijuan¹, SUN Huyuan^1,2,*, ZHANG Zhansen³, QU Shuqiang⁴, HANG Jiezhou⁴, LI Hui^5,6, DING Jiangyun⁶, DU Xuzhe⁶

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文章历史 +

摘要

目的明确Q370qENH和Q355C在干湿交替环境中锈层-钢基体界面的腐蚀机理和评估Q370qENH的耐候性。方法采用增重失重法、光学图像、X射线衍射分析（XRD）、标准电极电位分析等手段分别研究Q370qENH和Q355C在严苛干湿交替环境中的界面腐蚀机理。结果 Q370qENH在该试验条件下30 d的时间节点呈现更快的腐蚀速率,但会逐渐形成致密的Fe₃O₄骨架和α-FeOOH相填充的致密内锈层。Q370qENH和Q355C在60 d的厚度总损失分别为0.064 mm 和0.079 mm,2种钢材呈现出均匀腐蚀。XRD表征揭示出2种钢材的γ-FeOOH和β-FeOOH分别存在于外锈层和内锈层。结论 2种钢材在该试验环境中锈层-钢基体界面腐蚀机理是相似的,但Q370qENH在腐蚀后期展现出更为致密的内锈层,Cr、Ni和Cu的协同作用赋予Q370qENH良好的耐腐蚀性能,但Cr³⁺的添加会在Q370qENH表面生成更多的微孔。Β-FeOOH相存在会显著影响锈层的致密性,Q370qENH在试验周期中展现出良好的耐候性。

Abstract

The work aims to elucidate the corrosion mechanism at the rust layer-steel substrate interface of Q370qENH and Q355C in a wet-dry alternating environment and evaluate the weather resistance of Q370qENH. Methods including weight gain and loss analysis, optical imaging, X-ray diffraction (XRD) analysis, and standard electrode potential analysis were employed to investigate the interface corrosion mechanisms of Q370qENH and Q355C in a severe alternating wet-dry environment. Q370qENH exhibited a faster corrosion rate at 30 days in the experimental environment but gradually formed a relatively dense internal rust layer stabilized by a Fe₃O₄ framework and filled with the α-FeOOH phase. The total thickness losses of Q370qENH and Q355C at 60 days were 0.064 mm and 0.079 mm, respectively. Both steels exhibited uniform corrosion. XRD characterization revealed that γ-FeOOH and β-FeOOH were present in the outer and inner rust layers of the two steels, respectively. The corrosion mechanisms at the rust layer-steel substrate interface are similar for both steels in this experimental environment. However, Q370qENH exhibits a denser inner rust layer in the later stages of corrosion. The synergistic effect of Cr, Ni, and Cu endows excellent corrosion resistance to Q370qENH, but the addition of Cr³⁺ leads to the formation of more micropores on the surface of Q370qENH. The presence of the β-FeOOH phase significantly affects the density of the rust layer, and Q370qENH demonstrates good weather resistance throughout the experimental cycle.

导出引用

蔡振宇, 孙立娟, 孙虎元, 张占森, 渠述强, 杭杰周, 李辉, 丁江云, 杜旭喆. Q370qENH和Q355C在干湿交替环境中界面腐蚀机理研究[J]. 装备环境工程. 2026, 23(10): 123-131 https://doi.org/10.7643/issn.1672-9242.2026.10.014

CAI Zhenyu, SUN Lijuan, SUN Huyuan, ZHANG Zhansen, QU Shuqiang, HANG Jiezhou, LI Hui, DING Jiangyun, DU Xuzhe. Interface Corrosion Mechanism of Q370qENH and Q355C Steels under Dry-Wet Alternating Conditions[J]. Equipment Environmental Engineering. 2026, 23(10): 123-131 https://doi.org/10.7643/issn.1672-9242.2026.10.014

中图分类号： TG172.3

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